WordPress “Table is marked as crashed and should be repaired” Error & Solution

Recently had this error on my Scientology Parent website, owing to a translations plugin that went crazy and started caching jiggabytes of data locally and ran the /var/ partition out of disk space. Wordpress pages were showing up blank or coming up with “no posts matched criteria” messages.

Looking in /var/log/mysqld.log, found errors like:

130816 14:21:01 [ERROR] /usr/libexec/mysqld: Table './ScientologyParent_/wp_posts' is marked as crashed and should be repaired